Corrugator



Aug. 18,1936. SIEG 2,051,319

CORRUGATOR Filed April 16, 1935 4 Sheets-Sheet 1 ATTORNEYS Aug. 18,1936. K. SIEG 2,051,319

CORRUGATOR Filed April 16, 1935 4 Sheets-Sheet 3 INVENTOR [far] 1523557BY ATTO R N EYS Aug. 18, 1936. K. SIEG 2,051,319

CORRUGATOR Filed April 16, 1935 4 Sheets-Sheet 4 ATTORN EYS 1 .11. RT1310. 1/5 16 zr'a gf'gi Patented Aug. 18, 1936 PATENT OFFICEconnucs'ron Karl Sieg, Philadelphia, Pa., assignor to Samuel M. Langston00., Camden, N. 1., a corporation of New Jersey Application April 16,1935, Serial No. 16,570

15 Claims. (Cl. 154-31) In a type of machine commonly employed formaking single faced corrugated paper from a corrugated sheet and asurface sheet, there are employed three rollers, two having corrugatedand intermeshing ridges or teeth for corrugating one sheet, and thethird having a smooth cylindrical surface and acting to press thesurface sheet against the'crowns of the corrugated sheet while thelatter is in engagement, with one of the corrugating rollers, wherebythe two sheets are permanently connected by adhesiveconnecting thecrowns of the corrugations of the corrugated sheet to the surface sheet.

Heretofore it has been the. universal practice in machines of this typeto apply the adhesive to the crowns of the corrugations before the twosheets are brought together and while the corrugated sheet is travelingwith the middle roller from the point where the corrugations are formedto the point where the surface sheet is applied.

Experience has demonstrated the practical necessity of supporting thecorrugated sheet along this portion of the path of travel and this isdone by means of a series of guide fingers. These fingers prevent theuse of an adhesive applying means which will act along the full lengthsof the corrugations across the width of the sheet, and therefore theadhesive is applied to the crowns only on the portions thereof betweensuccessive guides. The result has been that the final product has hadnarrow sections lengthwise thereof corresponding in position to that ofthe guides and along which the two sheets are not adhesively connected.There is less structural strength along these lines and breaking orbending of the product or separating of the sheets along these lines mayoccur.

The main object of my invention is to overcome these defects and toproduce a product at commercially high speed and in an economical mannerand in which each corrugation is adhesively secured along its entirelength to the surface sheet.

In the type of machine above referred to it has been necessary to soform the guides that the corrugated sheet might sag or bulge a slightextent away from the corrugating roller along the portion of its travelwhere the adhesive was applied, so that in case the paper should breakadhesive would not be applied to the corrugating roller. This oftenresults in a slight variation in the size or height of the corrugationsproduced in the final product. Such variation is objectionable becauseif the single faced corrugated sheet isto be used in making a doublefaced sheet the low corrugations may not contact with the second surfacesheet and the high cnes may be crushed down. In either of these eventsthe resistance of the double faced sheet to bending is reduced. 5

A further object of my invention is to permit of close retention of thecorrugated sheet in the corrugations of the roller on which it is formeduntil the surface sheet is applied, so that there will be no opportunityfor variation in the size 10 of the corrugations.

It has been proposedto apply the adhesive to the surface sheet intransverse spaced strips which will register with the crowns of thecorrugations when the two sheets come together, but 15 so far as I amaware no machine has ever been built and put into commercial use, priorto my invention and which operated on this principle.

As an important feature of my invention I provide improved means forapplying the strips of adhesive, and including means for preventing theforming of a coating of adhesive, such as silicate of soda, frombuilding up in the applying roller.- Such a coating, if permitted tobuild up, eventually requires that the machine be shut down and thecoating scraped off from the corrugated surface of the applying roller,which is a long and tedious job.

As another feature of my invention I provide improved means which willprevent theapplication of strips of adhesive to the surface sheet andthus prevent such adhesive from being transferred to the corrugatingroller, if the corrugated sheet should break or when the end of thesheet is reached.

As a further feature I provide an electric control which will not beoperated when a hole in the sheet passes the control mechanism, but willoperate when the sheet is broken or tears in two or the end is reached.

As a further feature I provide means whereby the amount of adhesiveapplied by the corrugated applying roller may be varied by varying theextent of intermeshing of said corrugated applying roller and'anothercorrugated roller. In its pre- 4 ferred embodiment such means includes aspecial form of gearing which will prevent back lash or lost motionbetween the two rollers even though the degree of intermeshing of saidrollers be varied.

As another feature of the present invention there is provided new andimproved means operable while the, machine is running or is at rest foradjusting and registering the adhesive apmachine looking in the samedirection as Fig. 1,

Fig. 4 is a sectional detail taken on the line 4-4 of Fig. 3,

Fig. 5 is a sectional detail taken on the line 5-5 of Fig. 3,

Figs. 6 and 7 are transverse sections showing details of portions of themachine,

Fig. 8 is a sectional detail taken on the line 8-8 Of Fig. 2,

Fig. 9 is a perspective view showing a. part of an electric controlmeans applicable to stop application of adhesive if the sheet breaks.

Fig. 10 is a longitudinal section through the gear which may be employedfor driving the corrugated adhesive applying roller and the coactingcorrugated roller.

Fig. 11 is an end view of the gearing shown in Fig. 10,

Fig. 12 is an enlarged sectional detail showing the two corrugatedrollers in partly unmeshed position,

Fig. 13 is an enlarged sectional detail of the gears for driving saidcorrugated rollers and adjusted to prevent back lash when the rollersare partially separated, and

Fig. 14 is a section similar to a portion of Fig. 3, but showing adifferent arrangement of the parts for applying adhesive to the surfacesheet.

The present invention is illustrated as adapted to a machine designedfor the manufacture of single faced corrugated paper, which mayconstitute the final product for which may be delivered to anothermachine or'portion of a machine to have an additional liner orfacingsheet adhesively secured thereto.

In the specific form shown in the drawings, a sheet A to be corrugatedis advanced by feed rollers l0 and caused to pass between a pair ofintermeshing corrugating rollers II and I! which have the peripheriesthereof provided with longitudinally extending corrugations includinggrooves and ridges. The corrugated paper is held in contact with theperiphery of the corrugating roller I! along a portion of the peripheryby suitable guide means (not shown), and

passes between the roller [Land a smooth surface pressure roller' lit topress the liner or surface sheet B against the corrugated sheet.

Means are provided for applying adhesive directly to the surface sheet13 in strips extending across said sheet and spaced at intervalscorresponding to the distance between successive teeth of the rollers IIor II, said means being spaced from the corrugating rollers II and I2and the pressure roller IS. The sheet B is delivered from a suitablesupply roll or other source (not shown), and is passed over an idler l4and into contact with the smooth surface pressure roller i3.

The adhesive applying mechanism is disposed between the pressure rollerl3 and the idler I4, and includes an adhesive applying rolle'r l6 disofthe adhesive applying roller l6. In order that the adhesive be appliedto the surface sheet B in strips extending across the sheet and spacedat intervals corresponding to the distance between successive teeth ofthe corrugating roller II, the roller I6 is provided with teeth, thespaces between said teeth being substantially equal to the distancebetween successive teeth of the roller l2.

The adhesive applying roller I6 is drivenin synchronism with the rollerI! so that the space between adjacent adhesive strips applied to theliner B will'correspond to the distance between the teeth on the rollerl2.

The transmission between the drive and the corrugating rollers andadhesive applying mechanism is such as to permit thedriving of theadhesive applying mechanism while the corrugating rollers are shut down.This is highly advantageous in such cases as for instance where theoperator of the machine may desire to go to lunch or temporarily shutdown the machine for any other purpose. If the adhesive applyingmechanism is shut down, the adhesive thereon may dry and render thesubsequent operation of the machine dimcult. The cleaning of theadhesive applying mechanism for such a short shut down takesalongtime-and is therefore not practical.

In the specific form shown, there is provided a main drive pinion 23(Figs. 1 and 6) driven by any suitable source of power and meshing witha gear 24 keyed to a main drive shaft" on one side of the machine. Thetransmission between the drive shaft 25 and the corrugating rollers Iiand I2 is on said side of the machine, and includes a jaw clutch 26(Fig.6) having one element?! splined to said shaft and movable axiallytherealong by means of a suitable operating handle 28,-and a cooperatingclutch element 20 secured toa gear Ill, said clutch element 29 and gear30 being loosely mounted on said shaft. The gear 30 meshes with an idlergear 3| supported on a stud 32 and meshing with a' gear "mounted on theshaft of the vcorrugating roller 12. This roller l2 drives thecooperating corrugatlng roller l i through the intermeshing corrugationsof these two rollers.

I The transmission between the drive shaft 25 and the adhesive applyingmechanism is on the other side of the machine and includes a gear 35(Figs. 2 and 'l) which is, connected to a gear spider 36 keyed orotherwise fixed to the drive shaft 25, and which-meshes with an idlergear 31 (Fig. 8) which in turn drives an idler spur gear that theadhesive strips on the surface sheet 3 will come directly opposite to orin'registry with the crowns of thecorrugated sheet between the roller"and the pressure roller it. For that purpose, the gears 35 and 3'! havehelical teeth. and the gear 31 is movable axially to cause the rotationof the adhesive applying roller it with,

respect to the corrugating roller. As shown the gear 38 is looselymounted on a fixed stud shaft 43 (Fig. 8) through suitable bearings, andis provided with a hub or sleeve portion 44 upon which the helical gear31 is splined for axial movement therealong.

For moving the helical gear 31 axially,,there is provided a sleeve 45having a flange portion at oneendsecuredtothehelicalgearfl andconnectednear the other end to a thrust sleeve 46 bymeansofathrustbearingfl.Thisthrust sleeveliissplinedtothestudshaft 43soasto be axially movabletherealong and fixed against rotation, and has spaced shoulders at itsinner end opposite sides of the thrust bearings 41, whereby saidbearings.said sleeve 45, v

and said helical gear 31 are movable axially with said thrust sleeve 46.At the outer-end of said thrust sleeve 48 is a hand wheel 45 threaded onto the stud shaft 43' and having a flange 4! at one end thereofextending into a groove formed in the'thrust sleeve 45 whereby said handwheel is rotatable with respect to the thrust sleeve 46 and is movabletherewith in an axial direction. when the hand wheel 45 is turned. it ismoved axially on the threaded stud shaft 43, carrying with it thehelical gear 51. One of the helical gears 35 and 31 is substantiallylonger than the other so as to permit a substantial relative axialmovement without bringing said gears out of mesh. 'lhe axial movement ofthe gear 31 causes said gear to advance or retard with respect to-thehelical gear 35, and therefore causes the corresponding change in thespur gears 38 and 39 and the desired circumferential adjustment of theadhesive applying roller ii'with respect to the eorrugating roller i2.

Since the vibration of the machine and the end thrusts of the helicalgears are apt to accidentally turn the hand wheel 4. and cause themovement of the adhesive applying roller it out of proper registry,there is provided a locking hand wheel 50 having a hubportion i threadedonto the stud shaft 43 and adapted to abut the hub of the hand wheel 48so as to jam said latter wheel in locking position against the threadson the stud shaft 43.

As the teeth of the adhesive applying roller i5 travel in contact withthe surface sheet B, a portion of said adhesive is transferred to thesurface sheet while the excess adhesive is forced down along the sidesof the teeth. In order to prevent the collection of adhesive between theteeth-which adhesive may eventually set or become dry, there is provideda squeeze roller 52 which is provided with teeth corresponding andmeshing with the teeth of the roller l6, and which has a driveconnection with said roller it through said intermeshing teeth. Theteeth of the roller 5 52 are such as to substantially fill the spacebetweenthe teeth of the roller it when in intermeshing relationship. Forthat purpose, the crowns of the teeth of the roller 52 are convexlycurved to conform with the concave bases of the spaces between adjacentteeth of the roller it so that the adhesive is forced from the sides ofthe teeth of the roller, l5 and is collected at said bases as the twosets of teeth come into intermesh. From the bases, the adhesive isforced longitudinally along the ends of the roller i5 by theintermeshing teeth, so that the teeth of said roller it aresubstantially freed of adhesive before a new layer of adhesive isapplied thereto. 0 In order to regulate theamount of silicatetransferred to the-adhesive applying roller it, the shaft of the pick-uproller i8 is journaled in an eccentric bushing 53 (Figs. 2 and 5) onopposite ends'of said shaft. Keyed on to each of said bushings 53 is apointer arm 54 and loosely embracing said eccentric bushing is abracket55 having an arm 55:: on which is journaled the shaft of thetransfer roller i I. The arm 54 extends between the arms of a-yoke 56 onthe bracket 55, and the angular position of this pointer arm withrespect to the bracket 55 is adjusted by means of -a pair of adjustingscrews 51.

The bracket 55also has 9. lug 58 pivotally connected to one endof anadjusting arm 59, the 33 other end being pivotally connected to one endof a crank lever 60 securedto a rock shaft 6i. This crank lever 80 maybeswungabout its pivotal support by means of a nut 62 swivelled to I theother end of said lever and threaded on to a shaft 53. Tbs shaft 63 isrotated by means of a suitable hand wheel (not shown) through a sprocketdrive 65 and intermeshing bevel gears 66. By means of this arrangement,the extent of contact between the pick-up roller i8 and the transferroller I1 is effected by adjusting the angular position of the arm 54with respect to the bracket 55, this being done by means of theadjusting screws 51. This relative angular rotation causes the eccentricbushing 53 to be rotated so that the arm 54 of the bracket is raised orlowered, and the transfer roller i1 consequently moved to or from thepick-uprollerit.

when it is desired to regulate the extent of contact between thetransfer roller l1 and the adhesive applying roller it, the lever ismoved into adjusted position through the operation of the sprocket drivetorotate the bracket 55, thereby swinging the transfer roller I! aboutthe axis of the pick-up roller i8 and towards or away (:0 from theadhesive applying roller i6. Fine adjustments in the position of thetransfer roller i! may be efiected through an adjusting screw 51disposed on the outer end of the arm 55a and impinging the framestructure of the machine.

In order to regulate the extent of intermesh between the rollers I 6 and52, the shaft of the roller 52 is journaled at both ends in eccentricbushings 68 (Figs. 1, 2 and 4). These bushings have connected theretogears 69 meshing with 70 gears Iii fixed to the ends of an adjustingshaft This shaft ii at one end also carries a segmental gear l2 meshingwith a worm I3 enclosed in a suitable casing I4 and operated by means ofa hand wheel 15. Between the segmental gear I2 and the worm 1,3 andencircling said worm, there is provided a spring II which forms a saietydevice operating in case the paper should break and pass betweenrollersit and II. The rotation oi the hand wheel II causes the ro- "memestation oi thesegmental gear I! and the rotation of the eccentricbushings Cl the intermeshing gears 89 and ",thereby causing the squeezeor wiper roller I2 to towards or away from the roller i8.

Asanother ieature oi the present invention, new and improved meansare-provided tor causing the traveling suri'ace sheet B to move out of Acontact with the roller it upon a break in the continuity of the paperA. For that purpose, the guide roller ii is iournaled at one endoi anarm I (Figs. 1 and 2) flxedto a-rockshaft II to which may be looselymounted the'idler roller ll. Thearm tllisu'rgedina clockwisedirectionbyalever 82 fixed tothe rock shaft Ii and having a i counterweight 83adjustable therealong.

A latch device is providedior positively'holding' the roller 2i in guideposition against B to hold said paper in contact with the. roller It andagainst the action of the'counterweight I. p This latch device includesalatch'lever ll and is 01 standard type having a light-responsive orphotoelectric tube exposed through the'opening of an eye or tubedirected transversely to the line of travel of the paper A. A Disposedon theother side of the paper A is a source of light I. The details ofthe photoelectric device,'and the wiring circuits thereof iorm noportion of the present invention and may bevoi' any standard'type. Thelight 90 is continuously turned on but during normal paper. travel thepaper A is interposed A in the path of light'rays so thatthephotoelectric device 89 is not actuated. When' the paper A breaks or theend thereof has been reached, the

I light rays from the source 9| will be projected into the electric eyeto actuate the same and operate a relay (not shown) in the circuitiot-the solenoid windings, thereby'causing the solenoid link 88 to bedrawn upwardly (Fig. 1). This causes the movement of the latch lever llout of engagement with the arm 80 and the rotation oi said am in aclockwise direction under'the action I'll 01 the counterweight". Thisefl'ects the movement oi the roller 2| into the dotted podtion 0' shown,so that the paper B will; under its traveling tension, assume theposition indicated at D and in its movement towards the contactingportions 0! the rollers i2 and It will be spaced away from the adhesiveapplying roller IQ. 1

As the weight maybe heavy, to insure quick and positive movement, meansare provided whereby the idler roller ll maybe manually restored intoits originalguide position; For that Purpose, there is provided a cam I!mounted on a shaft 93 and cooperating with a cam roller 04 mounted onthe outer end of an arm Olflmed to the rock shaft ii. The shaft isrotated by means of a large hand wheel and causes the or the li t tostopthe application of adhesive exceptgin case theendoithesheetis'reachedorthesli'eetistornlu in two orbreaks. Thereforetheremayibe'emoi connectedins'eriessothatthereieasingmecha-:

nisrnwill not operate except 'whmlight flows to 15 all or the electriceyes. A mechanical form of circuit closer is illustrated somewhatdiagrams maticallyinl'ig. 9.- abovethe'sheetA between the rollersll lland II isabar Ill having loosely pivoted thereon a; piurality=oi20levers each havingone end portion Ill resting upon the sheet;There-maybeanyduiredmnnber of these, butordinarily three will besuilicient, oneadjacenttoeachedgeportionoithesheetand oneneareroppoaiteendoieachzt oitheleversisintheiormofaU-shapedcircuit closer I02and isnormally disposed adia'centto but out of contact with a sectionalelectric eonductor rod-ill. is made ill) oi'aaeries of sectionsinsulated from each other and the 00' insulation sections ill aredisposed'between the two branches of the U-shaped circuit closers I". aY

With the levers all supported on the sheet, the circuit clours will beomoi contact-with the rod 8v Ill and no current caniiow through thelatter. Ii' there isasma'll'break ortearin the paper so that one ofshown. inl 'igji the circuit not be current can flow unless allioithelevers swing which would 'indicaterthatthe: paper is broken across itsentire width or theend or the slieethasbeenreached. withalloftheleversrdown the circuitclosers willall bejin contact with the rod I and thecurrent msyiiowaround'all oi theinsulation sections Ill throughthebridging conductors. The current thus flowing through the rod mayoperate thevsolenoid 81 and stopthe application of adhesive :to thesheet as previously described. A Variousother means mightbe'employedwhich i ;would prevent the operation or the solenoid upon the passage01' ahole-inthe paper,butwhieh would cause its operation when there is abreak acrosstheentirewidtlL I In the construction shown in Fig.3 theadhesive is transferred to the'corrugated applying roller I by a smoothsurfaced roller l1 and the excess. of adhesive is removed from betweenthe corrugations by the corrugated roller II;

In the iormshown in Fig. 14- there are employed substantially the sameelements. but roller Isis mounted applying-row er I and the transierr'oller I'I .r Inthis arrangement the amount of adhesive is controlledby relag5 tively adjusting the rollers l8 and Into vary the extent of inoi the two rollers, both oi which are corrugated. The inter-meshingcontrols the amount oi' adhesive which isleiton the applying roller IOand preventstbebuilding up 7 oi'anylayeroi' adhesiveinthegroovesbetween.the corrugations oi the applying j roller. :The amount of adhesive'leiton the ends or the teeth oi the applying roller will be varied by theadjustmentoitheserollerstoward andiromeachu other as will be apparentfrom Fig. 12.v To adjust the two rollers so that they do not fully andcompletely intermesh would obviously leave a back lash or lost motion,and in order to prevent this there is provided the gearing shown inFigs. 10 and 11. The shaft of the applying roller is mounted in a sleeveI 06, while the shaft of the breaker rollers 52a is mounted in a sleeveI01. The power is delivered to the'shaft through a gear c from a drivinggear indicated at I08. Coaxial with the gear 400 and rigidly butadjustably connected thereto is a gear I09. The gear I09 is providedwith slots IIO for receiving bolts III, and the gear 40a is providedwith alug II2 within a socket I I 3 in the gear I09. Extending throughthe lug is an adjusting bolt I II which by being rotated may causeadjustment of the gear I09 in respect to the gear 40a, and when adjustedthe two gears may be rigidly clamped by the bolts III.

Meshing with the gear I09 are two similar coaxial gears II5 and H0normally locked together by bolts II'I extending through slots H0 in theouter gear Hi. When the rollers I0 and 5211 are fully in mesh the gearsII! and 6 are so positioned that the teeth of one are in accurateregistry with the teeth of the other so that the gears I I5 and I I0 actas asingle gear. when the rollers I6 and 52a are separated to a.slightly unmeshed position then the bolts III are loosened and the gearI I0 is rotated slightly so as to in eflect widen the teeth of thecombined gear H5, H6 and narrow the interdental spaces. In this way thecomextent of complete orv partial meshing with the gear I09. Byadjusting the gear I09 in respect to the gear 40a and by adjusting thegear H8 in respect to gear 5, accurate driving relationship will bemaintained,- and when the rollers I8 and 02a are partly out of mesh theteeth will not contact with each other'and no power will be transmitteddirectly from one to the other. The transmission of power will bethrough the gears.

The spacing of the-teeth of the rollers I 5 and 52a is indicated to anexaggerated degree in Fig. 12 and the effective widening of the teeth ofthe combined gear 5, H0 with corresponding narrowing of the interdentalspaces is indicated to an exaggerated degree in Fig. 13.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A machine for making corrugated paper, including means forcorrugating an advancing sheet, an adhesive applying roller having teethon the periphery thereof circumferentially spaced in accordance with thespacing of the corrugations of the corrugated sheet, and adapted to comesuccessively into engagement with a traveling surface sheet to applyadhesive to said latter sheet in spaced transverse strips thereacross,means for applying adhesive to the crowns of said teeth, and a rollerhaving circumferentially spaced teeth meshing with said first mentionedteeth for removing adhesive from the sides of said latter teeth anddisposed on the returning side of said adhesive applying roller betweenthe region where said latter roller comes into engagement with saidsurface sheet and said last mentioned means.

2. A machine for making corrugated paper, including means forcorrugating an advancing sheet, an adhesive applying elongated rollerhavof said teeth, means for applying adhesive to they 10 surface of saidtransfer roller, and a corrugated roller disposed between the point ofapplication of the adhesive from said adhesive applying roller and saidtransfer roller on the returning side of said adhesive applying roller,and having circum- 1s ferentially spaced teeth meshing with said first.mentioned teeth substantially throughout their entire length forremoving adhesive from the sides of said latter teeth, said rollershaving a driving connection through said intermeshing teeth.

3. A machine for making corrugated paper, including a pair ofcorrugating rollers adapted to corrugate an advancing sheettherebetween, an adhesive applying roller for applying adhesive to anadvancing surface sheet in strips extending 25 across said latter sheetand at spaced intervals therealong corresponding to the corrugationsformed on said first mentioned sheet, an idler roller, means tending tomove said idler roller from the normal path of movement of said surface30 sheet, means for positively pressing said roller against said paperagainst the action of said last mentioned means, and means operable inresponse to a break in the continuity of the sheet to be corrugated forreleasing said-pressing means 35 to permit said idler roller to be movedunder the action of said first mentioned means to space said surfacesheet from said adhesive applying roller. I 4. A machine for makingcorrugated paper, including a pair of corrugating rollers adapted tocorrugate an advancing sheet therebetween, an adhesive applying rollerfor applying adhesive to an advancing surface sheet in strips extendingacross said latter sheet and atspaced intervals therealong correspondingthe distance between the corrugations of said first mentioned sheet, apivotally mounted arm, a guide roller carried by said arm, acounterweight tending to move said guide roller away from the normalpath of movement of the traveling surface sheet, means forpositivelyholding said guide roller against the action of saidcounterweight to maintain said surface sheet in contact with saidadhesive applying roller, and means automatically operable upon a breakin the continuity of the sheet to be corrugated for disengaging saidholdmg means for permitting said guide roller, under the action of saidcounterweight, to so move that said surface sheet is withdrawn fromcontact with said adhesive applying roller. 00 5. A machine for makingcorrugated paper,including a pair of corrugating rollers adapted tocorrugate an advancing sheet therebetween, an adhesive applying rollerfor applying adhesive to an advancing surface sheet in strips extending05 across said latter sheet and at spaced intervals therealongcorresponding to the distance between the corrugations of said firstmentioned sheet, a guide roller, means for holding said guide roller incontact with a traveling surface sheet to To maintain said latter sheetin contact with said adhesive applying roller, a plurality of circuitclosers arranged in electrical series across the width of the sheet, anda solenoid operable upon operation of all of said circuitclosures and 75upon a break across the entire width of the paper I -means andpermitting saidguide roller and said to be corrugated for disengagingsaid holding latter sheet to move out of contact with said adhesiveapplying roller. v

6'. A machine for making corrugated paper, including means forcorrugating an advancing mentioned sheet, a rock shaft, an arm connectedto said rock shaft, a guide roller on said arm,

a pivotally connected latch lever adaptedto lock saidarm into guidingposition with the traveling surface sheet in contact with said adhesiveapplying roller, a solenoid having a link connected' to said latchlever, and means operable'in response to a break in theicontinuity ofthe sheet to be corrugated for energizing said solenoid to release saidlatch lever, whereby said surface sheet is causedto withdraw; fromcontact with said adhesive applying roller.

7. A machine for making corrugated paper, in-

cluding means for corrugating an advancing sheet, means for applyingadhesive to an advancing surface sheet in strips extending thereacrossand at spaced intervals therealong corresponding to) the distancebetween the corrugations of said a first mentioned sheet, said surfacesheet having a line of travel adjacent to said adhesive applying theperiphery thereof circumferentially spaced in I 7 means, an idler rollerspaced from said corrugating means and said adhesive applying means,

and disposed adjacent to the path of travel of said surface sheet,means. for pressing said roller 7 downwardly against said surface'sheetto -maintain said latterfsheet firmly in contact with the, adhesiveapplying means, and meansautomaticalLy operable upon a break inthecontinuity of the sheet to be corrugated for moving said idler:

roller to causesaid surface sheet to be withdrawn from contact withsaidadhesive applying roller.

8. A machine for, making, corrugated pape including means, forcorrugating an advancing .sheet, an adhesiveapplying roller having teethon therperiphery thereof circumferentially spaced in accordance with thespacing of the corrugationsof the cQl'rugatedsheet, andadapted tocomesuccessive y. into engagement with a travel ing surface sheet to applyadhesive to said latter sheet in spaced transverse strips thereacross,and means for applying to and controlling the amount of-adhesive on saidapplying roller, said means including a second. roller having teethmeshing with those ,of said, applying roller, and a in'accordance withthe spacing of the corrugations of the corrugatedsheet, and adapted tocome successively, into eng ementwith a travel- 'ing surface sheet toapply adhesive tosaid latter I sheet in spaced transverse stripsthereacross, and

said secondroller and applying means for applying to and controlling theamount of adhesive on said applying roller, said means including asecond roller having teeth meshing (with those of said applying roller,and a transfer roller, said transfer roller engaging theteeth ofadhesive to the latter. 7

10. A machinefor making corrugated paper,

including. means for corrugating an advancing sheet, an adhesiveapplying roller having teeth on the periphery thereof circumferentiallyspaced in accordance with the spacing of the corrugations, of thecorrugated sheet. and adapted to come successively into engagement witha traveling surface sheet to apply adhesive to said latter sheet inspaced transverse strips thereacross, and means for applying to andcontrolling the amount a of adhesive on said applying rolier,-said means10 includinga second roller. having teeth meshing withthose of saidapplying roller, and a transfer roller, both said transfer roller andsecond roller engaging the-teeth of said applying roller.

11. A machine for making corrugated paper, including means forcorrugating an advancing sheet, an adhesive applyingroller having teethon the periphery thereof circumferentiailyspaced in accordance with'thespacing of the corrugations of the corrugated sheet, and adapted to comesuccessively into engagement with a traveling sur- I face sheet to applyadhesive to' said latter sheet in spaced transverse strips thereacross,means for applying-to and controlling the amount of adhesive on saidapplying roller, said means in- Y cluding a second roller having teethmeshing with those of said applying roller, and a transfer roller. andapick-up rollerfor applying adhesive to said transfer roller. 7 v v 712. A machine for making corrugated paper, including means forcorrugating an advancing sheet, an adhesive applying roller having-teethon accordance with the spacing of the corrugations of the corrugatedsheet, and adapted to come s'uccessively into engagement with atraveling surface sheet to apply adhesive to .said latter sheet inspaced transverse strips thereacross, means for applying toandcontrolling the amount of adhesive on said applyingroller. said meansincluding a second roller having teeth meshing with those of saidapplying roller, and a transfer roller, and a pick-up roller forapplying adhesive to said, transfer roller, and said transfer rollerapplying adhesive to said second roller. 7 T 5 13. A machine for makingcorrugated paper, includingmeans for corrugating an advancin sheet, anadhesive applying roller having teeth on the periphery thereofcircumferentially spaced in accordance with the spacing of thecorrugations of thecorrugated sheet, and adapted to come successivelyinto, engagement with a traveling surface sheet to apply adhesive tosaid latter sheet in'spaced transverse strips vthereacross, means forapplying to and controlling the amount, of adhesive on said applyingroller, said means including a second roller having teeth meshing withthose of said applying roller, and a transfer rollerfor delivering theadhesive to one of said above mentioned rollers, and means for adjustinggo said applying roller and said second roller relatively to vary theextent of meshing of the teeth. 14. A machine for making corrugatedpaper, including means for corrugating an advancing sheet, an adhesiveapplying roller having teeth 5 on the periphery thereofcircumferentially spaced in accordance with the spacing of thecorrugations of the corrugated sheet, and adapted to come successivelyinto engagement with a traveling surface sheet to apply adhesive to saidlatter sheet 70 in spaced transverse strips thereacross, means forapplying to and controlling the amount, of adhesive on said applyingroller, said means including a second roller having teeth meshing withthose of said applying roller, and a transfer. roller, 16

means for adjusting said applying roller and said second rollerrelatively to vary the extent of meshing of the teeth, and gearing fordriving one of said toothed rollers from the other while preventingdirect contact of the teeth of one with the teeth of the other whenpartly unmeshed.

15. A machine for making corrugated paper, including means forcorrugating an advancing sheet, an adhesive applying roller having teethon the periphery thereof circumferentially spaced in accordance with thespacing of the corrugations of the corrugated sheet, and adapted to comesuccessively into engagement with a traveling surface sheet to applyadhesive to said latter 15 sheet in spaced transverse stripsthereacross,

means for applying to and controlling the amount of adhesive on saidapplying roller, said means including a second roller having teethmeshing with those of said applying roller, and a transfer roller, meansfor adjusting said applying roller and said second roller relatively tovary the extent of meshing of the teeth, a pair of meshing gearsconnecting said toothed rollers, each gear being circumferentiallyadjustable in respect to its roller, and means for varying the effectivewidth of the teeth of one gear to maintain said gear properly meshedwhile said rollers are partly unmeshed, whereby the teeth of saidrollers are prevented from direct contact.

KARL SIEG.

